docs: def get_stats(self, request, context):
          """Returns the server statistics."""
          _log_request(request, context)
          m = self.listener.memory
          return clearly_pb2.StatsMessage(
              task_count=m.task_count,
              event_count=m.event_count,
              len_tasks=len(m.tasks),
              len_workers=len(m.workers)
          )